<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Hello World!</h2>

<form method="post" action="login.do">
    用户名:<input type="text" name="username"  placeholder="用户名"><br>
    密码:<input type="password" name="password"  placeholder="密码"><br>
    <input type="submit" value="登入">
    <a href="register.jsp"><input type="button" value="注册"></a>
</form>
</body>
</html>
